Imported Scene is Very Slow – Deleted and Undoing Takes Forever
The .fbx file does seem rather resource hungry for such a simple scene. I've downloaded the .obj version for comparsion. Counterintuitively the .obj is both smaller in file size and loads much quicker despite being a ASCII text format. The reason seems to be that in the fbx import all objects are parented to empties and every object has 25 materials assigned. This increases the scene complexity and dependency graph that has to be constructed on import. The actual geometric complexity is identical, none the less the effect is quite profound since the fbx import requires 542.9 MB of memory compared to the 44.5 MB of the .obj import. The solution would be to use the .obj instead of the .fbx file.


Scene statistics .fbx


Scene statistics .obj

The light blue edges are marked as sharp.